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Science 4 October 2002:
Vol. 298. no. 5591, p. 9
DOI: 10.1126/science.298.5591.9o
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Comparing sedimentological data from lakes in the tropical Andes with records from high northern latitudes, Seltzer et al. (Reports, 31 May 2002, p. 1685) argued that deglaciation in the tropical Andes after the Last Glacial Maximum (LGM) preceded post-LGM warming in the Northern Hemisphere by as much as 5000 years. Clark comments that differences in the sedimentary environments of the southern and northern lakes studied by Seltzer et al. make comparisons between them inappropriate and that other deglaciation dates in the Northern Hemisphere show that early post-LGM deglaciation "was not unique to the tropical Andes." Seltzer et al., in their response, acknowledge the differences in sedimentology between the northern and southern lake systems, but assert that additional Northern Hemisphere data support the notion that deglaciation in the tropical Andes significantly led deglaciation in northern high latitudes. The full text of these comments can be seen at www.sciencemag.org/cgi/content/full/298/5591/7a




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Science. ISSN 0036-8075 (print), 1095-9203 (online)